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Intro image for article At the Bench: Cooke Mini S4s & the Cooke Look
Tutorials & Guides
Cooke makes several sets of primes lenses, from the high-speed 5/i set to the industry standard S4/i primes to the affordable Mini S4/i lenses. They are separated by T-stop, but they all share the "Cooke Look".
Intro image for article Lens Bokeh Explained
Tutorials & Guides
Bokeh is one of the more misunderstood concepts in optics. The term was coined for photographic use in 1997, from the Japanese word boke, meaning blur or haze. In recent years, "bokeh" has been simplified to refer to how the shape of a lens' iris is rendered in out-of-focus points of light in an image, such as streetlamps at night. Much is made of how many iris blades are used in a lens and how round the iris aperture is as it is stopped down, but these are only minor aspects of bokeh.